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Keywords: clay cover
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Proceedings Papers

Paper presented at the ISRM International Symposium, November 19–24, 2000
Paper Number: ISRM-IS-2000-581
... of a tunnel in the lower clay layermay be influenced by the presence of an upper layer depending on the type, state and thickness of the overlying material, and the amount of clay cover above the tunnel crown. INTRODUCTION In many parts of the world tunnels are excavated through clay with overlying layers...

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